ce51c92700ad92f66b5ff4bf68e696d85005fd1e0673eefb03ae5564e449ee6a

Analysis

max time kernel
146s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
21-03-2023 01:07

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General

Target

b7e81db3cf064c7d44327e444a921dbf231bfc09dbbcd5ba3fe2ed719103844e.dll
Size

4.7MB
MD5

27f80d31bb970b9365d5fd10821f6314
SHA1

5698b6129c6932e4c15c16c6161abbf3b6ae4055
SHA256

b7e81db3cf064c7d44327e444a921dbf231bfc09dbbcd5ba3fe2ed719103844e
SHA512

fe717aa0abfcdc9ef246c5f9d5e600c8643e1e38dc8ff4af5fc9ae06de35e1e0fcdcff79c2d58ff6ede94808a67f5ede3b0a606b43c5f93d9a57231af5cfa389
SSDEEP

98304:KG7QrWa6cNjjZmqPqOL0UAjwstPJCFg7C3sT8RmdMLA6QNE4/H:ajB9lQUitBCyT87AHE6H

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe

Themida packer 8 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/2108-133-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida
behavioral2/memory/2108-134-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida
behavioral2/memory/2108-135-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida
behavioral2/memory/2108-136-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida
behavioral2/memory/2108-137-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida
behavioral2/memory/2108-138-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida
behavioral2/memory/2108-139-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida
behavioral2/memory/2108-140-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

2108 rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	rundll32.exe

pid	process
2108	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b7e81db3cf064c7d44327e444a921dbf231bfc09dbbcd5ba3fe2ed719103844e.dll,#1
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:2108

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/2108-133-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download
memory/2108-134-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download
memory/2108-135-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download
memory/2108-136-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download
memory/2108-137-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download
memory/2108-138-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download
memory/2108-139-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download
memory/2108-140-0x00007FF9B3AA0000-0x00007FF9B46F8000-memory.dmp

Filesize
12.3MB

Download